Description
The Siemens Building Technology 274-03183 1/2 N/C S/R Valve Assembly is an electrically operated control used to adjust the flow of fluid in hydronic heating and cooling loops in HVAC systems. It is normally fitted in fan coil units, air handlers, or chilled/hot water systems, whereby proportional control of water or glycol is needed. The building automation or control system with a 24V/0-10 VDC and 4-20 mA control signal and 4 Cv. to open or close the normally closed valve to adjust the flow to match the load requirements and aid in maintaining a constant temperature and system efficiency.
